Merkur
Merkur's razors are all-metal DE safety razors - brass handles, die-cast zinc heads, both chrome-plated - with a standard recyclable steel blade and no plastic cartridge anywhere. They're fully plastic-free; the chrome plating is a finish over metal, not a plastic component.
How clear are their specs?
States the construction openly - chrome-plated brass handle and die-cast zinc head - rather than hiding it behind a generic "metal" label.